Shock-absorbing mechanism



2 Sheets-Sheet l July 27 1926.

S. B. HASELTINE SHOCK AB'sQRBING MECHANISM Filed August 4', 1924 1"This invention relatesy to improvements `'in Patented lliily 192,25'. f

a sTAcY n, HAsELrINE, or CHICAGO, rrrnrirozrs,f".lssre'riion naf MESNE As'sren Y Touw. H. MINEB, INc.,- A coRroRATIoNoF DELAWARE;- .z

shock 'absorbing-'mechanisms C Iie yobject of the: invention is `toprovide ;a,y 4capacity friction shock4 absorbing 'mechanism especially adapted for rail-way ydraft riggings, of'the friction .platet'yp'e 'having preliminary relatively light action,

@and high capacity frictional resistance and i i 4 'Utheiv objects and differential action; duringy the remainder of the compression stroke. i y

-. Another object of heinventi'onis'to provide a mechanism of the character indicated,

.' Wherein'simple and efficient means is provvided for restoring all ofthe parts ofthe mchanisinto normal position, after each compression stroke.

ventionwill more fully'and clearly appear .from the Idescription and claims hereinafter following. `Y g yIn the drawings, forming'afpart `of ythis specification', -Figure 1 l'1s- 1a longitudinal, horizontal, sectionalview of a'portion of a 'railwaydraft rigging showing my `iinfpfrovements in connection therewith Figure Q'is aV front end, elevationalfview 'of the shock absorbinfgfmechanism' proper; Figure 3y 1s j fa vertical, transverse, sectional view of v the shoclrfabsorbing'mechanism proper, corre-fL y y y l,

faces t the 'opposite s1des'lthereof, conv "adapt-editocoactwithfthe adjacent friction i s Gliding substantially .to the lineB-S figure 1, f AndFigure '4l is a detailed, perspec'tivei view of one'of the frictionshoes used in connection with my improved mechanisln.

A In said drawings, 10-10 indicate channellshaped, centre or draft sillsofusual contheV innerfaces of `wh1'ch lare securedjfront 'stop higs '11 and vrear `stop lugs 12; The inner "end of the drawb'ar yis indicated at 13,

v i the vsaine being operatively connectedl to a yoke 14 ofw-elly known form. Theshock .absorbing'mechanism proper and the front]v and 'rear followers 1 5 and 16 are disposed within the yoke` 14. The y yoke and the parts therewithin.aresupported in operative posi- 4,

tion a'dtchblesaddleplate 17 The "improved friction shock absorbing mechanism, as shown, comprises broadly a ersG-Giand aretainer bolt resistance Y. front and 181-18 Vvand spaced," longitudinally "disposed of the shell, each sidewall islrccessed von the .inner side 'asindicated 'a't`21-, providing front and rear abutment `shouldersy 22,'v The'4 'top i, i 1andbottomlwlls'180ithesheliiareprovided ,advantages fof the 'in- 2 3, for ,a piir'pose hereinafter; "described,l veach on 'thejinner .side ywitl'i `short transverse ribs rectangnlar,j box-like' castingopen?l at the 'i 4front and rear ends and. has spaced, longif'tiidinally disposed top `,and bottoniv 'walls vGo l wall having apair o f ribsatfthe]frontfand` l shown andhavingffhswuef .endspspaed frointh'e corres'poridingv side ,wallslQQ i The front and rearwedge blocksk B. efe of 1,; like de'SigmeaQhJBIQk beingnlfthe-forrn of a y'hollow casting and havin "shoes.j ,v Iheinnerfend of 'eachblofck is of cylindricalcap-like shape as y indicated at 26, 'provider en ;,interir set-servingas an; anchorage for-the corresponding end of the r retainer tbolt rear, A'ends ofthe' mechanism, `coopeiatiiig with 'they corresponding gw'edgeblo'ckks B'. On theinner side,-tl'iatV is, the side nearest the longitudinal axis of the mechanism, each shoe C has 'a lateralenlargement provided Q with -an louter 'wedge face corresponding- '1y inclined to" f one ofthe faces 2 5 'of' th'ej'corresponding f wedge block" B'. '.The .enlargement QTisiel cessed on the inner side. as indi'catedftQS' Gto' accommodate Ithe adjacent side of thend a-daptedto lcooperate `with c 7li'r'idricalv [portion 2d i of ,the cooperating 'wedgeblock'hftherecessbeingso propelsy v toned asfto provide`-einicient; clearanceto 'permita predeterminedlateraiaoveniento L Thefriction shoesCparieffour nnniber y v' and aref :arranged in pairs" atithel `frontA and mechanism.

the shoes toward the axis of the mechanism. Inwardly of the enlargement and on the same side, each shoe is eut away as indicated at 29 to accommodate the corresponding side of the spring resistance F, sufficient clearance being provided to allow for the lateral movement of the shoe, hereinbefore referred t0. At the opposite side, each shoe has a flat, longitudinally disposed friction surface 30 adapted to cooperate with one of the friction plates D. j

The friction plates l) are disposed on oppositesides of the longitudinal axis of the mechanism, each plate being interposed between the shoes D and the differential wedge elements E at the corresponding side of the Each plate D is of channel form as most clearly shown in Figure 3, having the web portion thereof vertically disposed and the top and bottom flanges 'inwardly projecting therefrom and embracing thecorresponding front and rear friction shoes. Each of the. plates D is fixed with reference. to the casing A, being yheld against longitudinal movement by having its frontend rear ends bearing on the front and rear ribs 23 at the corresponding side of the casing. .In this connection it will be noted that the plates are so mounted as to have free lateral movement Within the casing. f The flanges also stiften the plate longitudinally to prevent distortion thereof during the compression stroke of the mechanism. y l

The differential friction elements E which are four in number, are arranged in pairs at opposite ends-of the mechanism, beingv interposed between the corresponding ends of the mechanism, being interposed between the corresponding sidewall of the easing and the adjacent friction plate. Each of the differential friction elements E has a fiat inner face 3l cooperating with the outerv surface of the corresponding` plate D, and a. flat outer surface 120, correspondingly inclined tov and cooperating with one of the interior friction surfaces 2O ofthe corresponding .side wall 19 of the casing. At its outer end each element has a flange 39- laterally projecting inwardly Ltherefrom and overhanging the outer end of the adjacent friction wedge shoe C, as most clearly shown in Figure l. The flanges 32 are cutaway at their upper andwlower edges as clearly shown in Figure 2, te: clear the ribs of the casing. At the 'opposite end, each friction element has a lateral outwardly projecting lug 33 working in the recess 2,1 of the corresponding sidewall of the casing and cooperating` with one of the shoulders 22 at the end of said recess. By engagement with the shoulders 22, the outward movement of the friction elements E is positively -limited, and the flanges 3201i the elements E in turn limit the outward movement of the friction wedge shoes by engagement with the outer ends of the latter. When the parts are in normal position, the outer ends of the friction elements E are normally slightly spaced from theadjacent main followers to provide for preliminary action of the wedging system.

The spring resistance F, which comprises an inner light. and an outer relatively .heavier coil, is interposed between the front and rear spring followers G, the spring resistance being cent-ered byinwardly projecting fianges at the top and bottom edges of the followers G, the lower flangesk also serving as a supporting means for the spring resistance. The followers G in turnv bear -on the enlargements 27 of the corresponding wedge friction shoes C.

The parts are held in assembled relation and the .mechanism maintained `at proper overall length by the retainer bolt` H,l extending through the inner coil vof the spring resistance F and aligned. openings in the front and rear spring followe-rsGr and having its front and rear ends anehoredin the recesses ofr the hollow front and rear wedge blocks respectively. The bolt H also serves to hold the mechanism under initial compression. i' l The operation of the meehanism'is asfollows.l assuming an inward or bufling movenient of the drawbar. Upon inward or rearward movement of the drawbar, the'4 front follower l5 will be moved inwardly relatively to the rear follower 16 forcing the, wedges B and the shoes C relatively toward each other, compressing the spring vrcsistance F and placing the friction plates `D and friction elements E under increased lateral pressure, due to theI wedging action between the front and rear wedges 'and the corresponding pairs of friction wedge shoes. As the rearward movement of the follower l5 continues, the front set of shoes will slide on the friction surface of the plates..

D, and the plates l) will slide on the friction surfaces of the rear pair of shoes. During this action, the shoes will be moved outof engagement with the flanges 32 ofthe corresponding friction elements E. This action will continue until the front and rear followers respectively engage the front and rear pairs of friction elements E, whereupon the friction elements will be moved inwa rdly of the casing A, slipping on the friction surfaces of the plates D and the interior friction surfaces 2O atthe rfrontend rear ends of the casing. Due to the converging relation of the opposite faces 20, a differential action will be set up causing the, shoes C of each pair to approach each yother laterally of the mechanism, the shoes slipping on the wedge surfaces 25v of the front and rear wedge blocks. Due to the.differential action just described, the front and rear l the eleiifieiiteE, t'etety fiitliei eempieeeing the" melti- K Kepeilig;resistante,f The Adescribed eppeeite eiid'e ef the. eating tile eligegetl liv the filent" and feet' 'fellewefs respectively tiet iteee el the flanges SQ-will; ebelt 'the tteii't :intl-reef ends'eftlie tilietioripleteel) eiiiiulteneetely ytitli the eifig'egeiiieiitf et they 'reeieteliee fijeiiijbeing driven eolici f tien 'elements E 'enel tliep'ltitee D will thee tiet es a solid fielmente treneit't' the feetiitit.

ing tetee; tliteetly te tile-reet fellewereiiel step luge, thereby `p'rev'eiitimg tlie' Spring :Upon redete-tien ef the etiietiiig lette,

the yweelge pressure will lie ielievetl, diie te tl'ife'eeiiipetetive bltiiitrieeee-f the eilgle'iiieluded between the 'tetes 251 et 'thegwedge bleek@ B.; eetl' there will 'be en" ifiitieil yif'eletiee et the fiietieii slieesf'ejmd wedges iiidepeiltl- `relative mevemerittef the' trie- `E; `lliieflliitltil release eetiri [ie te tette-titer eiielegefgeeid Sheet G tethe eerresptoiidiiig(jtifietidii elements 13- es lieieietefeie *teleserie-ed'. lie eti-ey' emi quiet' pressure is4 thus 'assfdzn thertwo pairs effslie'e's; 'et the" opposite; ends iol *the meeh-y 'anisxar AIllovelA dut'w'vfxdly, icllle' to the ex 'tietleiief "the Spring tesieteiieegftlie,

pensive engagement with the flanges Sfffthejfrieg- 'tion lments, cal'lyillg th 'latter' dftvvttdly' ariell testeriiigtlie'eeme te iieiintil ipeeitien. Outward mevementef the frietienfelemerits et the wedge bleekelbe I'new 'consider thefpfefe'riedmetimer et 'eer-Wing' f eilt my' invention, jlnit :the 'seme ie.: merely illustrative 'eiiitl "l--etliiterepleteil fall the outward Vmovelllent ofSad shes. l 2.1m a lfriction vshock absorbmg -mech- `reepotitliiig' 'follower' means, seid' elements endleliellheviiig 'eov-eetiiig step meenertlierea 1.- v

y te

seid eler'iieiits and maintaining theie Qiltfe't f feiils normally oiitgof contact vwith tliefeoiriea L Sipllclillg follower; Wedge' lpes'su'r trallinittiiig meehe'engegedby eath follower eeft@ l lngemetine-g @pair of: frjietieii'wetlge "elmegeo-L ffietieii-slioee-"einl elemente, saidv leet lnetted vineeiis being lixecli against lengitiilltiel iiievement'witli reference ate? tlije shell Shoes. f

3; It e; -ftrietieiifelieele eleeetbiii-g iiieeh;

mism the combination' with a frflctoll 'Shell @tri'etioii 'shoes coepeljett'iiigfwith said yltleiiis; ftietitiii pleteiiieansiiiteiposetl between ilstiiel v transmitting member -eopf'eititiilg witllfeeeh follower eind adapted 'to' initially 'receive e the me .y

ythe f'figietieiigeleiiiente et, the eeieepoiitliiig L no'v` enieiiigtlie eembiiietien witliffrent 'ei/jid veel Y follower acting" 'meansg' of et fiietin; @hell peliv'ergiii'g fiietieri surfaces; frentleiidl freer keli tot limiting the eiltwejrely meveii'ieiitl of t. 1n le trietieii Steel; ebeerting' meehef nism, the combination with front and rear followers, .relatively movable toward and from each other; of a friction shell interposed between said followers, said shell having front and rear opposed sets of friction surfaces on the interior thereof; longitudinally disposed, elongated differential friction elements cooperating with said shell friction surfaces and adapted to be engagedV by said follower; wedge pressure transmitting means engaged byeach follower acting means; a plurality of wedge friction shoes cooperating` with each wedge pressure transmitting means; a main spring resistance; and friction plates interposed between said shoes and elements.

7. In a friction shock absorbing mechanism, the combination with front and rear follower members relatively movable toward and from each other; of a friction shell interposed between said followers and having its front and rear ends normally spaced from the respective followers, said shell having front and rear opposed, inwardly converging friction surfaces; differential friction elements cooperating with said shell yfriction surfaces and adapted to be engaged by said followers, said elements and shell having coacting stop means thereon for limiting the outward movement of said elements to maintain their outer ends normally out of contact with said followers; a wedge pressure transmitting member engaged by each follower; a plurality of friction wedge shoes cooperating with each wedge member, a main spring resistance.; friction plates interposed between said shoes and elements; and means on said friction elements for limiting the outward movement of said shoes.

8.aIn a friction shock absorbing mechanism, the combination with front and rear followers relatively movable toward and from each other; of a friction shell interposed between said followers and having its front and rear ends normally spaced from the respective followers, said shell having front and rear opposed, inwardly convergjing friction surfaces; an elongated, longitudinally disposed differential friction element cooperating with eachshell friction surface, said element being adapted for engagement and actuation. by one of said followers; means for normally holding said elements out of contact with said followers.; a longitudinally disposed friction plate at each side of the mechanism, said plates being held against longitudinal movement with reference to the shell and frictionally engaging the front and vrear elements at the corresponding side of the mechanism; front and rear lateral pressure creating means cooperating with the respective followers, each of said means including a wedge pressure surface, said element being adapted-for engagement and yactuation by one of ysaid followers; a longitudinally disposed friction plate at each side of the mechanism, said plates being held against longitudinal movement with reference to the shell and frictionally engaging the front and rear elements at the corresponding side of the mechanism;.front and rear lateral pressure creating means cooperating with the respective followers, each of said meansincluding a wedge pressure transmit-ting member and a pair of friction wedge shoes cooperating with said-frictionl plates; a main spring resistance; and means on said elements cooperating respectively with said shoes and shell for veffecting restoration of said shell to normal position and limiting the routward movement of said shoes. c

10. In a friction shock absorbing mechanism, the combination with front and rear followers relatively movable toward and from each other; of a friction shell adapted to be engaged bv said followers when the mechanismkis fully compressed to limit inward movement of the same, said shell having inwardly lconverging friction surfaces;

differential friction elements cooperating with said shell friction surfaces,v said elements adapted to be engaged by said followers after a predetermined relative movement of the latter; wedge pressure transmitting means; wedge friction shoes cooperating with said means .friction plate members cooperating with. said friction shoes and elements, said elements having means thereon adapted to engage the opposite ends of said plate members to limit the inward movement of the elements at the same time that i the movement of the followers is limited by engagement with the shell, wherebyl said elements, plate members, and shell together function as a colulnn-load-sustaining means; and a main spring resistance cooperating with said shoes.

In witness that I claim the foregoing I have hereunto subscribed my name this 10th day of July 1924. Y

c STAGY B; HASELDINE. 

